ONORM EN 1822-1 : 2011
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
HIGH EFFICIENCY AIR FILTERS (EPA, HEPA AND ULPA) - PART 1: CLASSIFICATION, PERFORMANCE TESTING, MARKING
01-09-2019
12-01-2013
Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
3.1 Definitions
3.2 Symbols and abbreviations
4 Classification
4.1 Groups of filters
4.2 Classes of filters
5 Requirements
5.1 General
5.2 Material
5.3 Nominal air volume flow rate
5.4 Pressure difference
5.5 Filtration performance
6 Test methods
6.1 Test rigs
6.2 Test conditions
6.3 Test aerosols
6.4 Survey of test procedures
6.5 Test procedures
7 Assessment of the filter, documentation
8 Marking
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